Seafloor Spreading

The evidence that old seafloor is destroyed at deep-sea trenches includes

The process of ___continually adds new crust to the ocean floor along the mid-ocean ridge

Name the process by which the ocean floor sinks into an ocean trench?

subduction occurs where the oceanic crust bends down toward the mantle at a(an)

What ocean landform is found at divergent boundary?

Harry Hess suggested that old oceanic crust was...

The rock made underwater from cooled lava is basalt.

How did scientists discover that rocks further away from the mid-ocean ridge were older?

The alternation stripes of magnetism on the sides of the mid-ocean ridge lead to the idea of

Mid-ocean ridges are

Where does molten material rises from the mantle and erupts?

What technology did scientists use to map the mid-ocean ridge?

old oceanic crust is more dense than new oceanic crust because it is

divergent plate boundary occur when occurs when two tectonic plates move away from each other

The scientist credited with sea-floor spreading is ___